import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import Users from '../components/user/users'
import Rights from '../components/power/Rights'
import Roles from '../components/power/roles'
import Cate from '../components/goods/Cate'
import Params from '../components/goods/Params'
import List from '../components/goods/list'
import Add from '../components/goods/Add'

Vue.use(Router)

const router = new Router({
  routes: [
    {
      path: '/',
      redirect: '/login'
    },
    {
      path: '/login',
      component: Login
    },
    {
      path: '/home',
      component: Home,
      redirect: '/welcome',
      children: [
        {
          path: '/welcome',
          component: Welcome
        },
        {
          path: '/users',
          component: Users
        },
        {
          path: '/rights',
          component: Rights
        },
        {
          path: '/roles',
          component: Roles
        },
        {
          path: '/categories',
          component: Cate
        },
        {
          path: '/params',
          component: Params
        },
        {
          path: '/goods',
          component: List
        },
        {
          path: '/goods/add',
          component: Add
        }
      ]
    }
  ]
})

// 挂在路由导航守卫
router.beforeEach((to, from, next) => {
  /*
    to: 将要访问的路径。
    from：代表从哪个路径跳转而来
    next()：是一个函数，表示放行
    next() 放行 next('/login') 强制跳转
   */
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
